Bulb.



l COPY- siraasfi specification of Lettersrat'eni.' j

raient-ea ann-.'21,.1913',l

Application id April 6, 1912.* serial No. 689,'0o8. v V!\-J To 'allwkom'z't mayconcem.' of rubber or other insulating material which Q Be-it knoivnthat" I, VAHAN GLESERIAN, is provided with a hole 1l forthe passaggen a'siibject of the'King of Great Britain, re of one of tlie'condueting wires. f, l siding at Buffalo, ,in the county of Erie and f .In the construction'fofthis lamp the-fila" i 5 State'of NewYork, have invented certain ment is constructed vandarra ngedas follows new and useful Improvements in Bulbs, of The stem 6 is provided with' sets of filamen t which tli'efollwing is aspecification. 'supporting projections'y s'ecuiedtheret This invention relates Ato ,incandescent any suitablemannenarfd 'projectinglont,-V lamps and has foritsiobject to provide an wardly. therefrom, these sets of filament 10 improved incandescent lamp so constructed porting projections being located at interand arranged that the light therefrom will vals apart' on said stein, the projections in be effectively distributedover the piace oceach set gradually increasing inlength from. i' copied by a person using said lamp. the uppermost set to the set of projections The invention further has for its object to at the lower end of thestem. Four sets of .ljprovidean'iinproved incandescent lamp so suoli filament supporting projections are.

constructed and arranged that the heat gen` preferably employed, each set. consisting o f 'f eratetl by the lamp will be effectively disthe projeetions 12, 13,'14 and 15 respectivelyi .tributed inthe bulb so asto protect the lat- The lengths of the filament supporting prorter froi'n nndue'heatinb; I jeetionsare such that the ends ofthe pro- .20 The"inve'ntionbfurther has forits object jeetioiis arespaced sufiiciently apart frein to provide an improved ineandeseentrlamp fectiv'ein'operationaiidldurable.` v-

N Referring t the accompanying drawing:

incandescent-lamp yconstructed in accordancftvitli thisinvention, F ig. 2`is a view o f i tlitI lamplooking from top to'bottom and l Aslioi'vin',`g the bulb inhorizontal section at its ow ,n -..T llustrate the carrying out of the inyeiron `1" indicates a glass bulb for the lainpconstriictedin accordance with this inventioii and'formed with an upper, narrow 35: tapering portion 2 whichA is gradually in 4r"elined outward to 'ard the bottom of the lamp to a point. as at 3, when it is formed with the oblong oval'portion t, providing a broad extending bottoni 5 to the lamp. 'lhe l0 lamp is further formed with the stenrt mounted wit-hin thesame and projecting from the narrow end of the lamp to a point adjacent to and spaced from the bottoni ot the lamp and preferably formed integral 55 into"engagement with a suitable lamp socket. lVithiu thercapfj), is located a filling piece 1() which will be lsiinlile-in construction, cfg- 1 45 with the glass 'bulh, said vstem t being ot the sidesofth'e bulb to afford a sufficientspace to; avoid "overheatingfthe bulb. It willrbe. seenthat by means of ythis arrangementA of thclament. supporting projections sets of projections are provided ot gradually increasing length and in stepped arrange- V ment to 'each other, the oblong, oval, lower' end of' thebulb permitting of'v this arrange- -inent and providing airextended horizontal space"whereby' an extended radiation of* light is provided downward to the user of the lamp sitting beneath the saine.

s lt indicates a current.conducting wire elecltrically connected at o'ne end to the cap 9' and extending down through the stein 6 to a point adjacent to the filament. supporting i projections l2 and then passing through the stein t3. The other current conducting wire IT is electrically connected :it one ciid to a contactA button 1S on the insulating piece l() and extends through the hole l1 therein and down through the stem tito the lower end thciwf. 'The current conducting wire lt', is connected to the end ol' one. of the filament supporting projections l2 as at li" with a filament 1S ot"platinuni or other suitable uniti-rmi which extends over and is connected with the ends of the remaining filanientv supporting projections l2 and'then leads to thev end of' one of the filament supporting projections l usal 1S) and passes over and is connected to the ends of the rcniainiiig filament supporting projections 13 and then leads tothe end of' one of the filamentsupp'oiting projections 1l as at 0 and passes over and is connected to the reina-inloo ing filament supporting projections 14, and then leads to and is connected with one of the filament supporting projections 15 as at 21 and paseos over and is connected to the ends of the remaining filament supporting projections 15 and is theneleetrically connected with the. end of the current conducting wire 1T at the lower end-of the stem (i.

lt will he seen from the foregoing eoni struction that'l when the lamp is secured to an electric socket and is located in an electric cil-enit `that the'incamlescent lilament arranged as vdescribed will afford sets of lights in accordance with the arrangement of the set.` of Iilament' supporting projections and that the radiation of lightfrom such sets of lights will be gradually extended in the horizontal plane so as to 'spread ont above the nser of the lamp. Moreover owing to the piramidal or stepped relation of the sets of filament supporting proJections spaced at. their ends from the lnilli undue,

`heating and cracking ot' the lamp will be avoided.

Having' described the invention: l claim-- .\n incandescent 'lamp globe cmnprising a bully. a hollow stem depending within said hull),V sets. ol' filament supports on said stein spaced apart from raeii other and of increased length relative to the sel alloro, and a filament extending from said sets ol' snpports in a p vramidal direction.

ln testimon)l whereof l allix my signature in presence ot two witnesses.

VllAN tllllll'lltlltix". Witnesses Rama-1 (i. 'li l .Vroni-zn, llmvnLL J. llurg'rnn. 

